Histories and romances
The first known references to Gawain outside Wales began to appear in the first half of the 12th century. In his Gesta Regum Anglorum of around 1125, William of Malmesbury writes that "Walwen's" grave had been uncovered in Pembrokeshire hundreds of years after his death, following the 11th-century Norman conquest of England. William recounts how Arthur's nephew, a renowned Post-Roman Briton soldier celebrated for his bravery, tirelessly fought against the Saxons led by Hengest's brother: "He deservedly shared in his uncle's praising, because he prevented the fall of his collapsing country for many years." William also noted uncertainty regarding the manner of his death: "There, as certain people claim, he [Walwen] was wounded by his enemies, and cast forth from a shipwreck; by others, it is said that he was killed by his fellow citizens at a public feast. Therefore, knowledge of the truth falls in doubt, although neither of these stories would fail in defense of his fame." He also describes Walwen as a former ruler of Galloway, which he says was still called Walweitha centuries later in his times.
It was Geoffrey of Monmouth's version of Gawain in the Historia Regum Britanniae, written around 1136, that brought the character to a wider audience. As in the Welsh tradition, Geoffrey's Gawain (Gualguanus) is the son of Arthur's sister (here named Anna) and her husband Lot (Loth), the prince of Lothian and one of Arthur's key supporters. Geoffrey mentions that Gawain was twelve years old at the time when King Lot and Arthur began a war with Norway, and that he had previously served Pope Sulpicius in Rome. Gawain later plays a major role as one of the leaders in Arthur's victory against the Romans, having personally started the conflict by killing the Roman envoy Caius (Gaius Quintilianus) in response to insults made against him and Arthur. Geoffrey's Gawain is depicted as a supreme warrior (even calling him and Hoel the two "warriors than whom no better had ever been born") and potential heir to the throne until he is tragically struck down by the forces of his traitorous brother Mordred (Modredus) at Richborough during an attempted sea landing that ended in disaster.
Geoffrey's work was adapted into many languages. The Norman Roman de Brut by Wace ascribes to Gawain the chivalric aspect he would take in later literature, wherein he favours courtliness and love over martial valour. Several later works expand on Geoffrey's mention of Gawain's boyhood spent in Rome, the most important of which is the anonymous Medieval Latin De Ortu Waluuanii Nepotis Arturi (The Rise of Gawain, Nephew of Arthur), which describes his birth, boyhood, and early adventures leading up to his knighting by his uncle.
Beginning with the five works of Chrétien de Troyes in the second half of the 12th century, Gawain became a very popular figure in Old French chivalric romances. Chrétien features Gawain as a major character and establishes some characteristics, such as his unparalleled courteousness and his way with women, which pervade later depictions. Furthermore, these early romances set a pattern in which Gawain serves as an ally to the protagonist and a model of knighthood to whom others are compared. In Chrétien's later romances, especially Lancelot, le Chevalier de la Charrette (Lancelot, the Knight of the Cart) and Perceval ou le Conte du Graal (Perceval, the Story of the Grail), the eponymous heroes Lancelot and Perceval prove morally superior to Gawain, who follows the rules of courtliness to the letter rather than the spirit. Chrétien's story of Gawain's cousin Yvain, Yvain ou le Chevalier au Lion (Yvain, the Knight of the Lion), was translated into Middle English as Ywain and Gawain. Gawain is also prominent in the continuations of Perceval, particularly the First Continuation and Perlesvaus.
An influx of French-language romances appeared in Chrétien's wake. Despite Gawain's popularity, his characterisation varies greatly between authors. In some of these "Gawain romances", such as La Vengeance Raguidel (or Messire Gauvain) and La Mule sans frein (perhaps also written by Chrétien himself), he is the hero. In others, such as Meraugis de Portlesguez and Hunbaut, he aids the hero. Sometimes he is also the subject of burlesque humour, as in the parody Le Chevalier à l'épée (The Knight with the Sword). In the variants of the Bel Inconnu (Fair Unknown) story, he is the father of the hero. Mériadeuc, also known as Le Chevalier aux deux épées (The Knight of Two Swords), contrasts the adventures of Gawain with these of his former squire, the eponymous Mériadeuc. Another notable squire of Gawain is the also eponymous protagonist of Gliglois.
For the English and the Scottish, Gawain remained a respectable and heroic figure, becoming the subject of several romances (a dozen in English, besides the likes of the Anglo-Norman Romanz du reis Yder) and lyrics in the dialects of their nations, such as the Middle Scots poem Golagros and Gawane. Important Gawain romances in English include The Awntyrs off Arthure (The Adventures of Arthur), Syre Gawene and the Carle of Carlyle (Sir Gawain and the Carle of Carlisle), and The Avowyng of Arthur (The Avowing of Arthur). The Middle Dutch romances by Penninc and Pieter Vostaert, the Roman van Walewein (Story of Gawain), held at Leiden University Libraries, and Walewein ende Keye (Gawain and Kay), are both dedicated primarily to Gawain. The Middle High German romance Diu Crône (The Crown) by Heinrich von dem Türlin, in which Gawain is the protagonist who achieves the Grail and heals the Fisher King, also features a minor character of "the other Gawain"—his lookalike, Aamanz.
Gawain is notably the hero of one of the greatest works of Middle English literature, the alliterative poem Sir Gawain and the Green Knight, where he is portrayed as an excellent, but human, knight. Here, Gawain strongly resembles the Irish mythological hero Cuchulainn. In the poem, he must go to the titular Green Knight to, presumably, be killed by the Knight. Gawain does this as it pertains to a deal made between the two without knowing that it is all a test by the Knight. He is cited in Robert Laneham's letter describing the entertainments at Kenilworth in 1575, and the recopying of earlier works such as The Greene Knight suggests that a popular English tradition of Gawain continued. Different variants of the Green Knight story include The Turke and Sir Gawain. In possibly Thomas Malory's The Weddynge of Syr Gawen and Dame Ragnell (The Wedding of Sir Gawain and Dame Ragnelle), his wits, virtue, and respect for women frees his wife, a loathly lady, from her curse of ugliness. The Child Ballads include a preserved legend in a positive light: The Marriage of Sir Gawain, a fragmentary version of the story of The Wedding of Sir Gawain and Dame Ragnelle.
The Lancelot-Grail (Vulgate Cycle) depicts Gawain as a proud and worldly knight and the leader of his siblings, who demonstrates through his failures the danger of neglecting the spiritual in favour of the material world. On the grand Grail Quest, his intentions are always the purest, but he is unable to use God's grace to see the error of his ways. Later, when his brothers Mordred and Agravain plot to destroy Lancelot and Queen Guinevere by exposing their love affair, Gawain tries to stop them. When Guinevere is sentenced to burn at the stake and Arthur deploys his best knights to guard the execution, Gawain nobly refuses to take part in the deed, even though his brothers will be there. But when Lancelot returns to rescue Guinevere, a battle between Lancelot's and Arthur's knights ensues, and both of Gawain's youngest full brothers are killed (Agravain, too, is killed by Lancelot, either on this occasion or in a previous encounter). This turns his friendship with Lancelot into hatred, and his desire for vengeance causes him to draw Arthur into a war with Lancelot in France. In the king's absence, Mordred usurps the throne, and the Britons must return to save Britain. Meanwhile, Gawain is mortally wounded by Lancelot himself after a long duel. King Arthur, his uncle in this version of the tale, becomes very distraught as he mourns his death. The Vulgate Mort Artu has Gawain's dead body carried to Camelot, where he is placed in the tomb of his dear brother Gaheriet.
Gawain's death in a battle against Mordred is described in detail in the English Alliterative Morte Arthure. Upon reaching land after returning to Britain from the continent, Gawain wreaks great slaughter on his enemies, killing the king of Gothland among others, before being surrounded on a hill. Breaking out, he pushes forward on a horse towards Mordred himself, and the two strike one another down from their horses with their lances. Gawain then attempts to cut Mordred's throat, but Mordred stabs him through the helmet. (As Mordred is portrayed there more sympathetically than in most other works, he later gives a sorrowful eulogy to his dead brother, calling him the best and most glorious of knights.) In the French verse Mort Artu attachment to Didot-Perceval, Gawain attempts to disembark during the sea landing at Dover when one of Mordred's Saxon allies fatally strikes him in the head through an unlaced helmet; a similar account is told in the English Stanzaic Morte Arthur. In the Italian romance La Tavola Ritonda, having been defeated in his duel with Lancelot, Gawain takes part in resisting an attack by Lancelot's friend and ally, Sir Turinoro of Cartagina, when he is struck on his head in the same place where Lancelot had wounded him and falls dead during a single combat with a knight named Turinoro, who also dies.
Thomas Malory's English compilation work Le Morte d'Arthur is based mainly, but not exclusively, on French works from the Vulgate and Post-Vulgate Cycles. Here Gawain partly retains the negative characteristics attributed to him by the later French authors, and partly retains his earlier positive representations, creating a character seen by some as inconsistent, and by others as a believably flawed hero. Gawain is the first to declare that he "shall laboure in the Queste of the Sankgreall" but really embarks on the Grail quest in order to gain more magical meals and drinks (metys and drynkes) from it rather than from a religious zeal or to save the Fisher King's kingdom. One of Malory's other French sources was L'âtre périlleux (The Perilous Cemetery), a poem including the eponymous story of Gawain's rescue of a woman from a demon.
Malory's version of Gawain's demise follows the Vulgate. Gawain's two sons and his brothers, except for Mordred, end up slain by Lancelot and his followers. Their death unleashes the vindictive hostility of Gawain towards his former friend, drawing Arthur himself into a war with Lancelot, first in Britain and then in France. Gawain's rage is so great that he refuses to cease fighting even after the Pope steps in and issues a bull to end the violence between Arthur's and Lancelot's factions. Following Mordred's betrayal, Gawain wages two wars against both Mordred and Lancelot. He twice challenges Lancelot to a duel, but each time loses and asks Lancelot to kill him. Lancelot refuses and grants him mercy before leaving. The mortally injured Gawain later writes to Lancelot, repenting of his bitterness, asking for his help against Mordred, and for forgiveness for splitting the Round Table. Following his death, Gawain also appears in Arthur's dream vision to tell him to wait thirty days for the reconciled Lancelot to return to Britain before fighting Mordred. Consequently, Arthur sends Lucan and Bedivere to make a temporary peace treaty, but the bloody final conflict ensues anyway. Upon his eventual arrival, Lancelot weeps at Gawain's tomb for two nights. In his editorial preface to Malory's Le Morte d'Arthur, William Caxton wrote that those visiting Dover Castle can still "see the skull of [Sir Gawaine], and the same wound is seen that Sir Launcelot gave him in battle."
Finally, there are versions in which Gawain does not die. In Jean des Preis's Belgian Ly Myreur des Histors, Arthur, defeated and wounded in his last battle with Mordrech (Mordred), goes with Gawain in a boat to the magic isle of Avalon for them to be healed there by the king's sister Morgaine (Morgan). The surviving Gawain also features in the earlier French epic poem La Bataille Loquifer, appearing together with Arthur and Morgan in Avalon, where they are all still alive hundreds of years later.